Calcium reclamation process

Details Calcium reclamation process Calcium reclamation process

1975-04-11

1976-12-07

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 6, 210 10, 210 67, C02B 120

Patent

active

039961338

ABSTRACT:
A process for reclaiming calcium values from the solid residual of incineration or calcination of calcium-bearing sewage and water sludges includes the following steps: classifying the residuals on the basis of their size and density to form two classified streams, the first of which contains relatively larger sized solid particles and has a relatively decreased concentration of calcium and the second of which contains relatively increased concentration of calcium for reuse; then mixing the particles in the first stream with water to form an aqueous solution containing calcium hydroxide; then clarifying the aqueous solution in a settling zone to form a sediment relatively rich in the insoluble inert solids and a decanted stream which is relatively rich in calcium values.

REFERENCES:
patent: 2072154 (1937-03-01), Butterfield
patent: 2178586 (1939-11-01), Joachim
patent: 3409545 (1968-11-01), Albertson
patent: 3546111 (1970-12-01), Busch
patent: 3623975 (1971-11-01), Cardinal et al.

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